import { v4 as uuidv4 } from 'uuid'

//要成成一个随机的字符串，且每次执行不能发生变化，游客身份持久存储
export const getUUID = ()=>{
    //先从本地存储获取，看一下是否有
    let uuid_token = localStorage.getItem('UUIDTOKEN')
    if(!uuid_token){
        //如果没有，生成临时身份
        uuid_token = uuidv4()
        //本地存储一次
        localStorage.setItem('UUIDTOKEN', uuid_token)
    }
    return uuid_token
}